9Cr—1Mo钢炉管焊接预热温度和SR退火制度的研究  

Studying on Welding Preheat Temperature and Technology of SR Annealing of Boiler Tube of 9Cr-1Mo Steel

作　　者：王振家[1] 陈伯蠡[1] 龙国文 

机构地区：[1]清华大学

出　　处：《焊管》1996年第6期20-24,29,共6页Welded Pipe and Tube

摘　　要：对厚度为８ｍｍ的退火９Ｃｒ—１Ｍｏ钢炉管进行了冷裂纹、再热裂纹敏感性的试验研究，认为该钢焊接时的ｔ８／５不小于１３ｓ时，可以不预热焊接，并给出了其他情况下选择预热温度的图表。进行了回火参数对该钢模拟粗晶区韧性及硬度的试验，并用阶梯冷却法及加（无）载短时等温时效试验考察了入选回火参数对高温时效性能的影响，结果表明该钢焊后宜进行７４０～７８０℃、至少保温２ｈ的ＳＲ退火处理。最后用上述焊接条件进行了实际炉焊焊接接头试验，取得了满意的结果。The sensitivities of cold crack and SRC of boiler tube of 9Cr-1Mo steel with 8mm thickness which was annealed are studied. This steel can be welding without preheating as t8/5 of the steel is less than 13s. A few of figures and tables for choosing preheat temperatures in other conditions are drawn. The toughness and hardness of simulating coarse grain zone are tested with various temper parameters. The effect of temper parameters being chosen on the aging property of high temperature is determined using ladder cooling and short time isothermal aging tests with load and non-load. The results express that the steel should be carried through SR treatment of 740℃ to 780℃ with keeping not less than 2 hours, and a satisfactory welded joint can be made with above parameters for. boiler tube welding.

关 键 词：锅炉钢管 焊接 预热温度 焊后处理 SR 退火制度 

分 类 号：TG441.8[金属学及工艺—焊接]